EP 2773649 B1 20170712 - PREVENTING SOLVENT OF CRYSTALLIZATION IN PRODUCTION OF POLYPHOSPHITE LIGANDS
Title (en)
PREVENTING SOLVENT OF CRYSTALLIZATION IN PRODUCTION OF POLYPHOSPHITE LIGANDS
Title (de)
VERHINDERUNG EINES KRISTALLLÖSUNGSMITTELS BEI DER HERSTELLUNG VON POLYPHOSPHITLIGANDEN
Title (fr)
PRÉVENTION DE SOLVANT DE CRISTALLISATION EN PRODUCTION DE LIGANDS POLYPHOSPHITES
Publication
Application
Priority
- IN 3721CH2011 A 20111031
- US 2012061874 W 20121025
Abstract (en)
[origin: WO2013066712A1] Residual wash solvent, e.g., ethyl acetate, is removed from polyphosphite, e.g., bisphosphite, crystals by a process comprising the steps of: A. Mixing the polyphosphite crystals and residual wash solvent with a secondary alcohol, e.g., isopropyl alcohol (IPA), to form a mixture of polyphosphite crystals, residual wash solvent and secondary alcohol, and B. Drying the mixture to remove the residual wash solvent and secondary alcohol to a content of less than 0.5 wt% based on the weight of the polyphosphite crystals.
IPC 8 full level
C07F 9/6574 (2006.01)
CPC (source: EP US)
C07F 9/65746 (2013.01 - EP US)
Citation (examination)
- EP 0518241 A2 19921216 - MITSUBISHI CHEM IND [JP]
- US 4351759 A 19820928 - SPIVACK JOHN D
- KIRK-OTHMER: "Concise Encyclopedia of Chemical Technology", 1985, JOHN WILEY & SONS
- RICHARD J. LEWIS: "Hawley's Condensed Chemical Dictionary 12th Edition", 1993, VNB
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2013066712 A1 20130510; CN 104093729 A 20141008; CN 104093729 B 20160907; EP 2773649 A1 20140910; EP 2773649 B1 20170712; IN 3131CHN2014 A 20150703; JP 2014532653 A 20141208; JP 2017114881 A 20170629; JP 6170059 B2 20170726; JP 6420385 B2 20181107; US 10227365 B2 20190312; US 2014288322 A1 20140925
DOCDB simple family (application)
US 2012061874 W 20121025; CN 201280053359 A 20121025; EP 12783477 A 20121025; IN 3131CHN2014 A 20140425; JP 2014538998 A 20121025; JP 2017022824 A 20170210; US 201214355392 A 20121025